Rails - Apr 2006 - Sorting with SQL for has_one, belongs_to relationship

I''ve been using this sort helper to have sortable tables.
http://wiki.rubyonrails.com/rails/pages/Sort+Helper

I''ve encountered a situation where I need to sort a column that is not
part of a table, but it''s related table.

For example, say I have db tables called foos and bars. Foos have
fields called name and title. And bars have fields called note and
foo_id. Foos has_one bar. My HTML table needs to have columns name,
title, and note and need to sort among them.

Is there a way to use sort helper to sort those columns? I''ve looked
at pure javascript solutions but I couldn''t find anything that fully
supports safari.

Thanks.